Mastering Biology Homework Answers

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In Chargaff’s experiments, DNA was extracted from the given organism, denatured, and hydrolyzed to break apart the individual nucleotides before analyzing them chemically.

These experiments provided approximate values for each type of nucleotide.

The structure and orientation of the two strands are important to understanding DNA replication.

In DNA replication in bacteria, the enzyme DNA polymerase III (abbreviated DNA pol III) adds nucleotides to a template strand of DNA.

But DNA pol III cannot start a new strand from scratch.

Mastering Biology Homework Answers Concept Analysis Dissertation Methodology

Instead, a primer must pair with the template strand, and DNA pol III then adds nucleotides to the primer, complementary to the template strand.As the two parental (template) DNA strands separate at a replication fork, each of the strands is separately copied by a DNA polymerase III (orange), producing two new daughter strands (light blue), each complementary to its respective parental strand.Because the two parental strands are antiparallel, the two new strands (the leading and lagging strands) cannot be synthesized in the same way.The DNA double helix is composed of two strands of DNA; each strand is a polymer of DNA nucleotides.Each nucleotide consists of a sugar, a phosphate group, and one of four nitrogenous bases.Drag the arrows onto the diagram below to indicate the direction that DNA polymerase III moves along the parental (template) DNA strands at each of the two replication forks.Arrows can be used once, more than once, or not at all.S, Hershey and Chase used a centrifuge to separate the phage ghosts from the infected cell.They then examined the infected cells and found that they contained _____, which demonstrated that _____ is the phage’s genetic material.In bacteria, there is a single origin of replication on the circular chromosome, as shown in the image here.Beginning at the origin of replication, the two parental strands (dark blue) separate, forming a replication bubble.


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